SRM-XML data modification

Hi

I have a requirement to modify PO price data before it convert to XML-  to XI system.

Ex- Price per unit, It should be always one-  Example - 10 EA = 80 $, I wanted to modify it as 0.8 per 1 EA in the XML file..

We able to achieve this in PO Change & in XML structure through XML BADI,, How ever some reason this isn't working for New PO's, It's not passing through that BADI... Looks like different place to code...  Any help appreciated..

BR
Srrimaan